EP0855002B2 - Stativ - Google Patents

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Publication number
EP0855002B2
EP0855002B2 EP96934667A EP96934667A EP0855002B2 EP 0855002 B2 EP0855002 B2 EP 0855002B2 EP 96934667 A EP96934667 A EP 96934667A EP 96934667 A EP96934667 A EP 96934667A EP 0855002 B2 EP0855002 B2 EP 0855002B2
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EP
European Patent Office
Prior art keywords
weight
compensating
load
arm
stand
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96934667A
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German (de)
English (en)
French (fr)
Other versions
EP0855002B1 (de
EP0855002A1 (de
Inventor
Andreas Metelski
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Leica Microsystems Schweiz AG
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Leica Microsystems Schweiz AG
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Application filed by Leica Microsystems Schweiz AG filed Critical Leica Microsystems Schweiz AG
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Publication of EP0855002B1 publication Critical patent/EP0855002B1/de
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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/001—Counterbalanced structures, e.g. surgical microscopes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
    • F16M11/02—Heads
    • F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
    • F16M11/06—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting
    • F16M11/10—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting around a horizontal axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
    • F16M11/20—Undercarriages with or without wheels
    • F16M11/2007—Undercarriages with or without wheels comprising means allowing pivoting adjustment
    • F16M11/2035—Undercarriages with or without wheels comprising means allowing pivoting adjustment in more than one direction
    • F16M11/2064—Undercarriages with or without wheels comprising means allowing pivoting adjustment in more than one direction for tilting and panning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
    • F16M11/42—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters with arrangement for propelling the support stands on wheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
    • F21L14/00—Electric lighting devices without a self-contained power source, e.g. for mains connection
    • F21L14/04—Electric lighting devices without a self-contained power source, e.g. for mains connection carried on wheeled supports
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/06—Bases for movable standing lamps; Fixing standards to the bases
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/50—Supports for surgical instruments, e.g. articulated arms
    • A61B2090/5025—Supports for surgical instruments, e.g. articulated arms with a counter-balancing mechanism
    • A61B2090/504—Supports for surgical instruments, e.g. articulated arms with a counter-balancing mechanism with a counterweight
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/50—Supports for surgical instruments, e.g. articulated arms
    • A61B2090/506—Supports for surgical instruments, e.g. articulated arms using a parallelogram linkage, e.g. panthograph
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/20—Surgical microscopes characterised by non-optical aspects
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M2200/00—Details of stands or supports
    • F16M2200/04—Balancing means
    • F16M2200/041—Balancing means for balancing rotational movement of the head
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M2200/00—Details of stands or supports
    • F16M2200/04—Balancing means
    • F16M2200/044—Balancing means for balancing rotational movement of the undercarriage
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/20—Lighting for medical use

Definitions

  • the aim is to find a truly optimal balancing system that maintains the balance over wide working areas of the tripod, eliminating the need for adjustment during work, or only necessary when the weight itself on the load itself is changed.
  • an alternative with changing geometric dimensions of the tripod arms is proposed. The operator on the microscope should be exempted from Balancierarbeit.
  • the DE-A1-43 20 443 Although there is a semi-automatic - in this respect also remotely controllable- tripod, but in which a different distribution of gulls is provided by two adjustable weights. Furthermore, the structure according to this document is limited to a balance in a certain position of the tripod. In addition, mandatory XY adjustments of the load (surgical microscope) are provided. In the course of further development of the invention, improvements over this known structure are realized.
  • the embodiment aims at a tripod with fully automatic adjustment of the balance.
  • the application of the new state is not restricted.
  • the optical range of near and distant magnifications falls below. Due to these forms of training or further developments, in each case partly independent problems are solved, which will be discussed below:
  • the invention provides anew, that forces or moments resulting from the imbalance, are measured in order to make a targeted adjustment of the or the counterweights.
  • the balance weight is shifted to that position in which the measured value of the forces or moments resulting from the imbalance is approximately zero.
  • These do not necessarily have to be absolute values (absolutely zero), they can also be relative values. For example, in a bending measurement on a load arm, a certain bending moment can be determined in the unloaded state, which increases by increasing the load.
  • the adjustment of the balance weight is controlled or triggered according to the invention by the size of the bending moment difference between unloaded and loaded state. According to one embodiment of the invention, a large difference in the measured values makes it possible to quickly adjust the balance weight or the balance weights; However, only slight imbalances cause a slight feed rate of the balance weight.
  • the targeted control of the balance weight can be realized on the one hand by, for example, light-optical, beam-coded displacement encoder or distance meter on the balance arm or else by a rotation monitoring of the drive spindle for the balance weight.
  • the full knowledge of the position of the balance weight before starting a measurement in this variant can be accomplished by an automatic zero adjustment of the system (balance weight moves automatically to a certain position after switching on the system) or on the fly by the current position of the balance weight a fixed point is determined on the balance arm.
  • the invention is based on a new knowledge, after the before the balance adjustment for the horizontal pivoting movement certain balance weight adjustment is required for the vertical pivoting movement.
  • the measuring devices provided according to the invention are constructed as torque measuring devices which can be accommodated in the region of any desired axes of the stand, provided that two components are mounted on these axles, which seek to perform a pivoting movement relative to each other in relation to the imbalance. Because at these points, the force generating the pivotal movement (the imbalance) e.g. be measured as torque.
  • a brake is activated, which blocks the pivotal movement of the parts to each other. The forces which the brake has to absorb correspond to the desired torques. In the unbalanced state, the torsional forces on the brake are zero.
  • a comparison measurement of the resulting torques takes place from the bending moments of the load and the bending moment of the compensating weight.
  • the forces on the brake via a measuring arm which is rotatably connected or braked with one of the two mutually pivotable parts, transmitted to the outside and intercepted by a rigid support of the other of the two parts.
  • the resulting bending on the measuring arm which is proportional to the torsion, is measured directly or indirectly on the measuring arm.
  • Strain gauge elements are preferably used for this purpose.
  • the measuring arm can also have a slight play relative to the stop, so that Small pivoting movements still proceed without measured values, while on the other hand, depending on the size of the measured values, a different adjustment process of the balancing weight or weights can be triggered.
  • a micro-switch or the like is operated as a emergency switch, so that in case of excessive imbalance (for example, a surgeon stumbles and catches his body weight on the microscope at short notice), the balancing weight is immediately shifted to a new same position.
  • a microswitch can also be spring loaded and / or biased.
  • Variants in which only the absolute weight change of the Gesfelstativs is measured to determine the change in weight of the load and depending on the shift or the Austiciansgowichte to move are also covered by the invention.
  • the relative positions of the balance weights to their associated pivot points are detected as second measurement parameters, so that in the case of an absolute weight change of the stand, which in the case of the example is due only to a change in the weight of the load, the relative position of the respective balance weight changed position exactly becomes.
  • the measurement and / or displacement of the balance weight takes place with a time delay.
  • This has the advantage that the balance can be made relatively unadulterated.
  • an operator at the load microwave
  • the electric brakes of the tripod with his hands still holding the microscope, so that the weight of the hands could falsify the measurement result.
  • Another inventive aspect of the application is the choice of a new advantageous material for the tripod.
  • the Nachtell in conventional tripods is in a relatively voluminous design, which leads to a relatively high total weight with reasonable strength of the tripod and thus to a corresponding load on the floor or ceiling (depending on the site).
  • parts of the stand are made of sintered or glued - preferably non-epoxy-bonded - fiber composite, e.g.
  • Another aspect is to remove the so far on tripods - especially surgical microscopes - disturbing cabling.
  • this has the disadvantage that in the assembly of the tripod or in a service case, the cables had to be withdrawn or removed from the hollow arms, which is expensive.
  • the number of interfaces or connectors can be reduced, so that the Transmission performance of the cable is optimal, although these are well protected against access from the outside, as in a pipe installation.
  • this carrier of the tripod are formed in two parts and parallellegend, so that between them creates a space in which the cables can be laid, the space can be covered by removable cover plates.
  • a particular embodiment of the covers for the cable channel provides a snap fastening of the covers, which between the preferably tubular round arms with resilient residuals, which are integrally formed with the lid, e.g. can be injection-molded In place of snap fasteners, continuous screw fastenings or adhesive connections are also possible.
  • Another aspect lies in a different protection or cable channel for the load - usually to the microscope - leading cable, which can be used independently, but also in combination with the above-mentioned cable channel meaningful.
  • It is a flexible hose, e.g. a corrugated hose, which is provided at its input and preferably also at its output with a rotatable coupling, so that upon rotation of the load arm about a vertical axis of the corrugated hose has the opportunity to join the rotation to a certain extent, so that the hose is not loaded on Torston.
  • the advantage of this new cable guide is thus in particular in a protection of the cable from mechanical stress and injury to the cable by external action.
  • the use of the hose reduces the risk of unwanted contamination of the cables with germs or the like.
  • the hose can be disinfected more easily than previously the cables. It can easily be made of a material that is generously treated on its surface by means of liquid disinfectant can, which may be problematic with certain insulation materials for the cables used.
  • hose used can be dispensed with, since a usable product is known by it and on the market.
  • a usable product is known by it and on the market.
  • Another aspect of the invention is directed in particular in a surgical microscope on the guide or holder thereof in the region of the load grip.
  • tripod Mitaka and all conventional tripods tried in principle to achieve the center of gravity by the fact that the actual microscope slide-mounted left and right mounted adjustable to get to the center of gravity days, not only left and right, but also to and from behind.
  • adjustable carriages In all three levels, there were adjustable carriages, whose adjustment by operating personnel is relatively complex and expensive.
  • these adjustments are also automated by measuring any bends, torques or other measurement parameters on the microscope and making corresponding corrections of counterweights. Under certain circumstances, with the adjustments in the direction perpendicular to the plane in which the load arm is located, also balances with a spirit level with optical tap can be made, the position of the dragonfly is evaluated with optical sensors and then the appropriate adjustment is initiated.
  • conventional slide guides and / or conventional arms or parallelogram guides can be provided, or preferably a novel chain drive, which makes it possible to dispense with parallelogram links and still ensures good load bearing of the load with minimum space requirements and obstruction of operators.
  • a new chain drive is described in the Swiss patent application with the official file number: 03351/95.
  • Another aspect of the invention relates to the problem of transporting tripods with relatively large and sweeping arms. It is known that tripods are supported on stands and feet on wheels. A fixation with respect to the ground is accomplished by means of a locking of the wheels or a lowering of adjusting feet or the like. In this regard, for example, on the DE-U-84 00 384 directed. When moving the tripod this is conventionally rolled on its wheels. When driving through the door frame or the like. The size of the tripod can be a hindrance. Although previously the load or balance arms could be pivoted into a position that reduced the space requirement of the tripod, but an improvement is desirable.
  • Diesses problem is solved according to the invention by the constructive possibility of lowering the stand of the tripod or the arm on the stand relative to the stand and / or the Absenkbarkeit least one of the feet supporting wheels, so that during transport, the tripod receives a misalignment, the transport height and If necessary, further reduce the center of gravity.
  • the size of the tripod is also determined by the size of its components and the number of required individual components.
  • the size of the tripod is also determined by the size of its components and the number of required individual components.
  • the new inventive solution provides to support the stand by means of a cross roller bearing against the fuse that can be used optimally and wear-free before aging with respect to the low rotational speeds of the tripod about its vertical axis.
  • the cross roller bearing is well integrated in the foot of the Stalivs due to its low height and thus the tripod freely and easily rotatable about its vertical axis.
  • the footprint of the stand is further reduced compared to the known.
  • Another aspect of the invention relates to the electromagnetic brakes that are used in the joints of the tripod to fix the arms or arms relative to each other.
  • a known brake is exemplary in the already mentioned EP-A-656 194 in the Figure 12 and 13 shown. Pressing springs press brake discs against a counterpart so that it is clamped between two brake discs. On one side of a brake disc, an electromagnet is mounted, which attracts the brake disc in the excited state and thus releases the counterpart. After switching off the electromagnet, the brake disc is pushed unbraked by the spring force against the counterpart. In the collision with this results in a relatively loud noise, which can be distracting in an operating room.
  • a brake for the joints of the tripod is provided, which is quieter with good braking properties. This is achieved in that the electromagnet is not de-energized, but gradually de-energized, so that the brake disc is pushed by the spring force braked against the counterpart.
  • An improved variant provides that instead of the spring for pressing the brake disc, a permanent magnet is provided, which holds the brake braked in the de-energized state.
  • Another aspect of the invention relates to the simplification of the tripod components While conventional tripods have a plurality of different components, each of which has a specific function, it is provided according to the invention to design at least the load arm and the vertical swivel arm supporting it identically so that it can be saved in mass production , A sectional C-shaped structure of these parts causes a correspondingly large free working area for the users. The new geometry has also had a positive effect on the balancers possibility. In the description of the figures reference is made to further identical components.
  • the balance-like built-up tripod Fig.1 has a pivot axis 9, via which a load and balance arm from a horizontal plane 63 can be pivoted.
  • a displaceable by an adjusting 7 balance weight 5 tries to balance a load 3 above the axis 9.
  • the displacement device 7 is controlled by measured values which can be obtained in measuring devices 6 af. These are measuring devices which measure bends 6a, e, f, trains or pressures 6b, c or e, or torques 6d, depending on the location and type of assembly, and return them to the displacement device.
  • any of the mentioned measurements can be used to determine any changes in weight of the load 3 on the load suspension 6 and the balance weight 5 to move accordingly.
  • pressures or bending in the load arm 2 additional information is needed to properly control the displacement device 7. This information can be, for example; Before load change knowledge of the balanced position of the balance weight 5.
  • Bending moment measurements in the region of the upright 6a, e do not require any additional information insofar as the displacement of the balance weight 5 merely has to be reduced in such a way that the bending moments approach zero.
  • the upper part of the stand 40 is pivotable, it will be referred to as a swivel stand in the following.
  • the pivotability between stand 1 and pivot stand 40 by a spring tension or the like. be prepared so that the pivoting stand 40 is held out by a spring, not shown, in the interior of the stator 1 in its desired position at an angle to the vertical or from a vertical plane 54.
  • a preferred variant is in contrast in Fig. 2 shown, where a pivoting stand 40 is held around a vertical pivot axis 18 freely pivotable on the stand 1.
  • a part 40a serves as a load part, which carries the horizontal pivot axis 9 and the load and balance arm 2a, 4a and a compensation arm 40b, which carries a balance weight 5b, the pivoting stand 40 on the vertical pivot axis 18 in balance with the balance weight 5a, the load and the weight of the arms 2a and 4a holds
  • This symbolically illustrated tripod represents the mechanical separate function of horizontal and vertical pivoting about horizontal and vertical planes 63 and 64.
  • FIG. 3 shows a pivot axis 9A, which basically allows the free pivoting of the load arm 2 relative to the stator 1.
  • a brake 10a which blocks the axis 9a in the braked state and blocks pivoting. If the balance in the axis 9a is left at an upper weight of the load 3, a torque arises there which, as symbolically indicated, can be measured.
  • the measuring device 6d1 also represents an angle measuring device that can be used for alternative measuring methods. For example, if the angular position between the load arm 2 and the stator 1 and the pressure in a measuring device 6c (FIG. Fig.1 ), it can be concluded from these two values on the size of the load or load change and accordingly an adjustment of the balance weight 5 are made.
  • the variant after Figure 4 refers to a basic structure according to Fig.2 with variability in both horizontal and vertical planes.
  • the swing stand 40 is fixedly connected in this embodiment with an angle extension 40b1, which carries a balance weight 5b.
  • a pivoting of the pivoting stand 40 from the vertical plane 64 is possible, wherein the balance weight 5b establishes the balance with the components carried by the pivoting stand 40.
  • dar Measuring device 6d3 a bending moment measured on a bending beam of a braking device 10b.
  • a symbolically represented computer or computer 14 evaluates the measurement result of 6d3 and controls on the one hand a drive 11a of the displacement device 7a on the compensation arm 4 and on the other hand the drive 11b on the compensation arm 40b1.
  • FIG. 6 A variant too Figure 3 is shown in Figure 6, where a bending beam 69 of a measuring device 6d2 is subjected to bending as soon as the brake 10a, which is mounted on a driver part 67, this brakes on the shaft 9a.
  • a display 13 On which the imbalance can be read.
  • the information about the imbalance of an operator is communicated visually or acoustically in order to enable a manual balancing.
  • the variant after Figure 7 corresponds to the principle of Fig.2 insofar as a complete separation between vertical and horizontal pivoting movement is made.
  • the pivoting stand 40 with its compensation arm 40b carries the balance weight 5b, which is possible only about the vertical pivot axis 18 together with a corresponding pivoting movement of the pivoting stand 40.
  • the load arm 2 with the balance arm 4 or, the associated parallelogram 15 and 17 designed so that a pivoting of 15 and 17 about the horizontal pivot axis 9 is independent of the pivot stand 40 is possible.
  • a part of the parallelogram 17 is congruent with the part 40a in the illustration.
  • measuring possibilities provided in this example are shown by way of example and as an alternative with measuring device 6d or 6h.
  • the new and innovative racking method is symbolic in Figure 8 shown in a block diagram.
  • the measured values are fed to a controller 14 which, on the one hand, carries out calculations and, on the other hand, issues adjusting commands.
  • the leading to this adjustment adjustment value is converted in the controller 14 by means of tables or formulas to an adjustment value for the balance weight 5b, which is realized by an adjustment 7b.
  • a braking device 10e is provided in the region of the rotary bearing 34, which is electrically detachable via a supply line 32.
  • Figure 10 is a housing 33 for the foot 23 again.
  • a parallelogram guide 17 with individually designated components 17a-f carries the balance weight 5a and a measuring device 6h.
  • a pivoting stand 40 with parallelogram guide 40b carries the counterweight 5b.
  • a Lagerbook 35 and associated arms 2d and e and 40a1 and 40a2 secure the vertical position of the load suspension 8 in all pivotal movements.
  • 17a corresponds to 17d
  • 17g corresponds to 2b
  • 17c corresponds to 2c
  • 17f corresponds to 2f
  • 17h corresponds to 171
  • 2e corresponds to 2d
  • 5a corresponds to 5b.
  • a pivoting head 1b which sits as the main support member on a pivot bearing 34 on the stator 1a, holds by means of non-visible axis, the two pivoting arm 40a1 and 40a2 in position.
  • 40a1 and 40a2 could also be formed as a single piece, ebeneo as the two arm parts 2d and 2e. According to the invention, however, these are divided into two parts, on the one hand to reduce the depth and on the other hand to provide the inventive cable channel.
  • This cable channel is off Figure 16 seen in section and has substantially a cover 38 and a cover 37, which cover the space between the two tubular arms to a channel.
  • cover 38 and the lid 37 are within the scope of the invention, various variants, including snap devices for snapping onto the tubes.
  • FIG. 15 shows in symbolic representation of one of the principles of the invention, which is also realized in the objects 11 to 14
  • the hose channel 41 protrudes from the plane, in which the arms are 2, vertically sb. This allows the load to freely rotate about a vertical axis of rotation 69.
  • the load can be conveniently rotated in all desired directions without the cables or tubing 41 being in the way.
  • air can also be sucked through the hose channel 41, which can be used for cooling purposes or evacuations under a drape.
  • suction operations may be continued through the duct between the arms or through the arms themselves.
  • the inventive braking and measuring device works as follows: In the non-energized state of the electromagnet 50, the brake disc 48 is attracted by the permanent magnet 49 via brake shoes 47 and braked.
  • the brake disk 46 is rigidly connected to a shaft 51 via a clamping sleeve 52.
  • Permanent magnet and electromagnet are rigidly connected to it via a bearing sleeve 53, which is screwed to the arm 17e.
  • the shaft 51 is thus rigidly connected to the arm 17e in this state.
  • a pivoting of the arm 17d is basically possible via the bearings 54b.
  • a Drehgsberusion 56 is rigidly connected to the shaft 51 between the part 171 and the bearing sleeve 53.
  • the rotary driver 57 rigidly carries a rotary driver 57, which moves downwards and holds a bending beam 58 by means of fastening nut 61.
  • the bending beam 58 is held between two stops 58 held without play.
  • the stops 59 are rigidly in a measuring body 65 of the measuring device 6h. Leizterer is shown for clarity.
  • the measuring body 65 is rigid with the part 17i and thus connected to the part 17d. A pivoting thereof via its bearings 54 is thus stopped.
  • strain gauges and bending beams instead of strain gauges and bending beams, other measuring elements such as piezo elements or the like. replace the variant shown by way of example in a conventional manner.
  • a preferred measuring and control routine allows the different speed driving the balance weight. For example, with voltage values between plus / minus 10 volts, the command for a quick adjustment can be initiated, with a normal adjustment speed being induced between plus / minus 5 volts and slowing down to the desired set value of the range between plus / minus 2 volts after a voltage ramp Balance weight is given.
  • the computer control 14 variants are conceivable, with waiting times between current measurement results and aktuallen displacement operations. It is usually measured with the brakes applied. Released brakes allow an operator to change the position of the tripod.
  • a particular embodiment of the invention are - apart from force measurements - and absolute position measurements of at least one balance weight 5a provided relative to its support arm 17e.
  • An optical or magnetic bar code 70 is scanned by a magnetic or optical sensor element 71.
  • the sensor element is directly or indirectly connected to the balance weight 5a, so that its position on the arm 17e can be determined.
  • Absolutposition measurements have the advantage, according to a further embodiment of the computer control 14 in response to load changes with the balance weight 5 targeted to a specific To be able to drive compensation positions. Basic settings or calibrations are therefore also possible.
  • the controller can already specify the approximate weight of this component when mounting an additional part to the load (load increase), whereupon the controller can still perform a positioning (repositioning) of the balance weight without performing a measurement on the measuring device 6a.
  • a particularly simple variant is based on that factor, which is determined depending on the geometry of the tripod.
  • the other balance weight is automatically shifted by a factor shortened or extended distance. This can be achieved by appropriate speed control of the actuators or different thread pitches of Spindein 12 and so on.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Microscoopes, Condenser (AREA)
  • Manipulator (AREA)
EP96934667A 1995-10-12 1996-10-12 Stativ Expired - Lifetime EP0855002B2 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH2976/95 1995-10-12
CH297695 1995-10-12
CH297695 1995-10-12
PCT/EP1996/004454 WO1997013997A1 (de) 1995-10-12 1996-10-12 Stativ

Publications (3)

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EP0855002A1 EP0855002A1 (de) 1998-07-29
EP0855002B1 EP0855002B1 (de) 2003-06-25
EP0855002B2 true EP0855002B2 (de) 2011-12-21

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US (1) US6129319A (enExample)
EP (1) EP0855002B2 (enExample)
JP (1) JP4041536B2 (enExample)
DE (2) DE59610558D1 (enExample)
WO (1) WO1997013997A1 (enExample)

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Also Published As

Publication number Publication date
EP0855002B1 (de) 2003-06-25
US6129319A (en) 2000-10-10
DE29624639U1 (de) 2006-06-08
WO1997013997A1 (de) 1997-04-17
EP0855002A1 (de) 1998-07-29
JP4041536B2 (ja) 2008-01-30
JP2001509861A (ja) 2001-07-24
DE59610558D1 (de) 2003-07-31

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